AirHint found the following cheapest return flights from Denver (DEN) to Keflavik (KEF) in June 2026 (see full year).
Return flights
| 01 Jun - 08 Jun | Icelandair | direct | |
| 30 Jun - 06 Jul | Icelandair | direct | |
| 04 Jun - 17 Jun | Icelandair | direct | |
| 16 Jun - 22 Jun | Icelandair | direct | |
| 02 Jun - 14 Jul | Icelandair | direct |
Also check the deals for one-way flights from Denver to Keflavik in June.
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